Whether a vehicle flies at high altitude, rolls on 18 wheels, or hauls cargo across oceans, a transportation inspector makes sure it meets all laws and regulations. They keep vehicles, cargo, and passengers on the move as well as safe. Vehicle inspectors examine cars, trucks, and accessories to report on the condition of their parts, typically for a car dealership or a government agency. They ensure there are no illegal devices on cars or trucks, such as those meant to get around auto emissions laws. They also conduct test drives to see that everything sounds, and feels, like it’s running smoothly, and to determine whether there’s been prior damage. Physical strength may be needed to lift heavy equipment for some inspections. Typically, vehicle inspectors need a high school diploma and on-the-job training. Aviation inspectors review all procedures, equipment, and systems on an aircraft to ensure it meets federal safety regulations. They examine flight logs and maintenance records to verify all required checks have been performed, and investigate accidents and complaints to determine causes. Most positions require a certificate from an aviation maintenance technician school approved by the Federal Aviation Administration, along with on-the-job experience. Freight and cargo inspectors ensure ships’ freight is secured and complies with regulations. They measure ships’ holds and tank contents, calculate hold capacities, and check conditions of shipping and storage areas. Most positions require a bachelor’s degree.